Number Filter to ignore Document title

Hi,

this time I have a quick one:

I'm using the Number Filter Node on some Documents. Said Documents' title are numbers. After the Number Filter did its work, the Document titles are empty/blank.

Is there a way to tell the Node to ignore Document titles or some other workaround? Couldn't find any for now (except the document extractor/string to document again, but in that case its way too sophisticated).

Thanks,

Manu